diff -r 4a76497f2eaa -r 7a3610dca96b src/HOL/Library/Code_Char.thy
--- a/src/HOL/Library/Code_Char.thy	Fri Jun 18 15:03:20 2010 +0200
+++ b/src/HOL/Library/Code_Char.thy	Fri Jun 18 15:03:20 2010 +0200
@@ -58,12 +58,12 @@
   (SML "String.implode")
   (OCaml "failwith/ \"implode\"")
   (Haskell "_")
-  (Scala "List.toString((_))")
+  (Scala "!(\"\" ++/ _)")
 
 code_const explode
   (SML "String.explode")
   (OCaml "failwith/ \"explode\"")
   (Haskell "_")
-  (Scala "List.fromString((_))")
+  (Scala "!(_.toList)")
 
 end